diff --git a/src/fpga/api/fpga_api.cpp b/src/fpga/api/fpga_api.cpp
index 706614e9449eb33e70e261b221d8882a9353ddbf..8167d4cf7d1fd343e15754bafc7c77ee6f52a822 100644
--- a/src/fpga/api/fpga_api.cpp
+++ b/src/fpga/api/fpga_api.cpp
@@ -58,9 +58,9 @@ void fpga_copy(void *dest, const void *src, size_t num) {
   memcpy(dest, src, num);
 }
 
-int ComputeFpgaConv(struct FpgaConvArgs args) {}
-int ComputeFpgaPool(struct FpgaPoolArgs args) {}
-int ComputeFpgaEWAdd(struct FpgaEWAddArgs args) {}
+int ComputeFpgaConv(struct ConvArgs args) {}
+int ComputeFpgaPool(struct PoolingArgs args) {}
+int ComputeFpgaEWAdd(struct EWAddArgs args) {}
 
 }  // namespace fpga
 }  // namespace paddle_mobile
diff --git a/src/fpga/api/fpga_api.h b/src/fpga/api/fpga_api.h
index 3db15c6ddc1843a5b6e91b0267ddbc0e606d87f8..4225e887c3dadeddf48b173db72412a5209d989d 100644
--- a/src/fpga/api/fpga_api.h
+++ b/src/fpga/api/fpga_api.h
@@ -58,7 +58,8 @@ struct KernelArgs {
 };
 
 struct ImageInputArgs {
-  void* address;  // input featuremap virtual address
+  void* address;         // input featuremap virtual address
+  float* scale_address;  // input scale address;
   uint32_t channels;
   uint32_t width;  // featuremap width
   uint32_t height;
@@ -73,29 +74,26 @@ struct ImageOutputArgs {
 
 struct ConvArgs {
   bool relu_enabled;
-  float scale;  // input scale;
   void* bias_address;
   void* filter_address;
   uint32_t filter_num;
   uint32_t group_num;
 
   struct BNArgs bn;
+  struct KernelArgs kernel;
   struct ImageInputArgs image;  // input image;
   struct ImageOutputArgs output;
-  struct KernelArgs kernel;
 };
 
 struct PoolingArgs {
-  float scale;
+  struct KernelArgs kernel;
   struct ImageInputArgs image;  // input image;
   struct ImageOutputArgs output;
-  struct KernelArgs kernel;
 };
 
 // elementwise add arguments
 struct EWAddArgs {
   bool relu_enabled;
-  float scale;
 
   float const0;  // output0 = const0 x input0 + const1 x input1;
   float const1;
@@ -130,11 +128,35 @@ struct FpgaRegReadArgs {
 #define IOCTL_CONFIG_POOLING _IOW(IOCTL_FPGA_MAGIC, 22, struct PoolingArgs)
 #define IOCTL_CONFIG_EW _IOW(IOCTL_FPGA_MAGIC, 23, struct EWAddArgs)
 
+enum FPGA_ERR_TYPE {
+  ERR_IOCTL_CMD = -1,
+  ERR_TIMEOUT = -2,
+  ERR_COMPLETION_TIMEOUT = -3,
+  ERR_INVALID_FPGA_ADDR = -4,
+  ERR_NOMEM = -5,
+  ERR_NO_RESERVE_MEM = -6,
+  ERR_COPY_FROM_USER = -7,
+  ERR_COPY_TO_USER = -8,
+  ERR_DEL_TIMER = -9,
+  ERR_ENABLE_MSI = -10,
+  ERR_REGISTER_IRQ = -11,
+  ERR_PCIE_REGISTER = -12,
+  ERR_PCIE_PROBE = -13,
+  ERR_REGISTER_BLOCK = -14,
+  ERR_ALLOC_GENDISK = -15,
+  ERR_INIT_QUEUE = -16,
+  ERR_WAIT = -17,
+  ERR_ECC_ERROR = -31,
+  ERR_FPGA_FAIL_STOP = -64,
+  ERR_FPGA_DEBUG_STOP = -113,
+  DEV_TMP_UNAVAILABLE = -128
+};
+
 //============================== API =============================
 
-int ComputeFpgaConv(struct FpgaConvArgs args);
-int ComputeFpgaPool(struct FpgaPoolArgs args);
-int ComputeFpgaEWAdd(struct FpgaEWAddArgs args);
+int ComputeFpgaConv(struct ConvArgs args);
+int ComputeFpgaPool(struct PoolingArgs args);
+int ComputeFpgaEWAdd(struct EWAddArgs args);
 
 }  // namespace fpga
 }  // namespace paddle_mobile
diff --git a/src/operators/op_param.h b/src/operators/op_param.h
index dc790ee348e4070bd2891debe21c6f8e7bcdcdf0..88c1886ad7ade5960d1d8175a1b46e12363ca849 100644
--- a/src/operators/op_param.h
+++ b/src/operators/op_param.h
@@ -262,11 +262,11 @@ class ElementwiseAddParam : OpParam {
 #ifdef PADDLE_MOBILE_FPGA
 
  private:
-  fpga::FpgaEWAddArgs fpga_EW_add_args;
+  fpga::EWAddArgs fpga_EW_add_args;
 
  public:
-  const fpga::FpgaEWAddArgs &FpgaArgs() const { return fpga_EW_add_args; }
-  void SetFpgaArgs(const fpga::FpgaEWAddArgs &args) { fpga_EW_add_args = args; }
+  const fpga::EWAddArgs &FpgaArgs() const { return fpga_EW_add_args; }
+  void SetFpgaArgs(const fpga::EWAddArgs &args) { fpga_EW_add_args = args; }
 #endif
 };
 
@@ -465,11 +465,11 @@ class PoolParam : public OpParam {
 #ifdef PADDLE_MOBILE_FPGA
 
  private:
-  fpga::FpgaPoolArgs fpga_pool_args;
+  fpga::PoolingArgs fpga_pool_args;
 
  public:
-  const fpga::FpgaPoolArgs &FpgaArgs() const { return fpga_pool_args; }
-  void SetFpgaArgs(const fpga::FpgaPoolArgs &args) { fpga_pool_args = args; }
+  const fpga::PoolingArgs &FpgaArgs() const { return fpga_pool_args; }
+  void SetFpgaArgs(const fpga::PoolingArgs &args) { fpga_pool_args = args; }
 #endif
 };
 #endif
@@ -933,11 +933,11 @@ class FusionFcParam : public OpParam {
 #ifdef PADDLE_MOBILE_FPGA
 
  private:
-  fpga::FpgaConvArgs fpga_conv_args;
+  fpga::ConvArgs fpga_conv_args;
 
  public:
-  const fpga::FpgaConvArgs &FpgaArgs() const { return fpga_conv_args; }
-  void SetFpgaArgs(const fpga::FpgaConvArgs &args) { fpga_conv_args = args; }
+  const fpga::ConvArgs &FpgaArgs() const { return fpga_conv_args; }
+  void SetFpgaArgs(const fpga::ConvArgs &args) { fpga_conv_args = args; }
 #endif
 };
 
@@ -991,11 +991,11 @@ class FusionConvAddParam : public OpParam {
 #ifdef PADDLE_MOBILE_FPGA
 
  private:
-  fpga::FpgaConvArgs fpga_conv_args;
+  fpga::ConvArgs fpga_conv_args;
 
  public:
-  const fpga::FpgaConvArgs &FpgaArgs() const { return fpga_conv_args; }
-  void SetFpgaArgs(const fpga::FpgaConvArgs &args) { fpga_conv_args = args; }
+  const fpga::ConvArgs &FpgaArgs() const { return fpga_conv_args; }
+  void SetFpgaArgs(const fpga::ConvArgs &args) { fpga_conv_args = args; }
 #endif
 };
 
@@ -1096,11 +1096,11 @@ class FusionConvAddBNReluParam : public OpParam {
 #ifdef PADDLE_MOBILE_FPGA
 
  private:
-  fpga::FpgaConvArgs fpga_conv_args;
+  fpga::ConvArgs fpga_conv_args;
 
  public:
-  const fpga::FpgaConvArgs &FpgaArgs() const { return fpga_conv_args; }
-  void SetFpgaArgs(const fpga::FpgaConvArgs &args) { fpga_conv_args = args; }
+  const fpga::ConvArgs &FpgaArgs() const { return fpga_conv_args; }
+  void SetFpgaArgs(const fpga::ConvArgs &args) { fpga_conv_args = args; }
 #endif
 };
 #endif
@@ -1190,11 +1190,11 @@ class FusionConvAddBNParam : public OpParam {
 #ifdef PADDLE_MOBILE_FPGA
 
  private:
-  fpga::FpgaConvArgs fpga_conv_args;
+  fpga::ConvArgs fpga_conv_args;
 
  public:
-  const fpga::FpgaConvArgs &FpgaArgs() const { return fpga_conv_args; }
-  void SetFpgaArgs(const fpga::FpgaConvArgs &args) { fpga_conv_args = args; }
+  const fpga::ConvArgs &FpgaArgs() const { return fpga_conv_args; }
+  void SetFpgaArgs(const fpga::ConvArgs &args) { fpga_conv_args = args; }
 #endif
 };
 #endif